A tubular shaped item with or without flange(s) designed to reduce friction and carry a kinetic load on the surface(s) parallel to the axis of the bore. it must have a visible or detectable means of lubrication or be self-lubricated. the over all length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body, except for straight tubular (without flange or shoulder) items having a bearing surface(s) parallel to the axis of the bore only. includes items which are divided into two or more segments which include 180 degrees (3.141 radians) or less of the bearing periphery. see also bushing, sleeve; spacer, sleeve; and washer (as modified). excludes pin, hollow.
Dept. of the Navy 
Spain Classification: Parts, nesoi, for roller bearings or for combined ball/roller bearings, nesoi
NSN 5975-01-266-1706
NSN 5945-01-232-9939
NSN 6130-00-153-3136
NSN 5965-01-633-8849
NSN 7035-00-171-0804
NSN 6105-01-263-5304
NSN 6240-00-960-0315
NSN 6620-00-033-3280
NSN 6620-00-451-8783
NSN 6105-01-565-4914
NSN 6110-00-679-8961
NSN 5925-00-529-0441